jspacker - jspacker_test.go

     1  package jspacker
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"testing"
     7  
     8  	"vimagination.zapto.org/javascript"
     9  	"vimagination.zapto.org/parser"
    10  )
    11  
    12  type loader map[string]string
    13  
    14  func (l loader) load(url string) (*javascript.Module, error) {
    15  	d, ok := l[url]
    16  	if !ok {
    17  		return nil, os.ErrNotExist
    18  	}
    19  	tks := parser.NewStringTokeniser(d)
    20  	return javascript.ParseModule(&tks)
    21  }
    22  
    23  func TestPackage(t *testing.T) {
    24  	for n, test := range [...]struct {
    25  		Input   loader
    26  		Output  string
    27  		Options []Option
    28  	}{
    29  		{ // 1
    30  			loader{"/a.js": "1"},
    31  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\n1;",
    32  			[]Option{File("/a.js")},
    33  		},
    34  		{ // 2
    35  			loader{"/a.js": "1"},
    36  			"\n\n1;",
    37  			[]Option{File("/a.js"), NoExports},
    38  		},
    39  		{ // 3
    40  			loader{
    41  				"/a.js": "import {c} from './b.js'; console.log(c)",
    42  				"/b.js": "export const c = 1",
    43  			},
    44  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"c\", () => b_c]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst b_c = 1;\n\nconsole.log(b_c);",
    45  			[]Option{File("/a.js")},
    46  		},
    47  		{ // 4
    48  			loader{
    49  				"/a.js": "import {d} from './b.js'; console.log(d)",
    50  				"/b.js": "export {d} from './c.js'",
    51  				"/c.js": "export const d = 1",
    52  			},
    53  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"d\", () => c_d]], [\"/c.js\", [\"d\", () => c_d]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst c_d = 1;\n\nconsole.log(c_d);",
    54  			[]Option{File("/a.js")},
    55  		},
    56  		{ // 5
    57  			loader{
    58  				"/a.js": "import {c as d} from './b.js'; console.log(d)",
    59  				"/b.js": "export const c = 1",
    60  			},
    61  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"c\", () => b_c]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst b_c = 1;\n\nconsole.log(b_c);",
    62  			[]Option{File("/a.js")},
    63  		},
    64  		{ // 6
    65  			loader{
    66  				"/a.js": "import {f as g} from './b.js'; console.log(g)",
    67  				"/b.js": "export {e as f} from './c.js'",
    68  				"/c.js": "const d = 1;export {d as e}",
    69  			},
    70  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"f\", () => c_d]], [\"/c.js\", [\"e\", () => c_d]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst c_d = 1;\n\nconsole.log(c_d);",
    71  			[]Option{File("/a.js")},
    72  		},
    73  		{ // 7
    74  			loader{
    75  				"/a.js": "import c from './b.js'; console.log(c)",
    76  				"/b.js": "export default 1",
    77  			},
    78  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"default\", () => b_default]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst b_default = 1;\n\nconsole.log(b_default);",
    79  			[]Option{File("/a.js")},
    80  		},
    81  		{ // 8
    82  			loader{
    83  				"/a.js": "import c from './b.js'; console.log(c)",
    84  				"/b.js": "export {default} from './c.js'",
    85  				"/c.js": "export default 1",
    86  			},
    87  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"default\", () => c_default]], [\"/c.js\", [\"default\", () => c_default]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst c_default = 1;\n\nconsole.log(c_default);",
    88  			[]Option{File("/a.js")},
    89  		},
    90  		{ // 9
    91  			loader{
    92  				"/a.js":   "import {d} from './b/b.js'; console.log(d)",
    93  				"/b/b.js": "export {d} from '../c/c.js'",
    94  				"/c/c.js": "export const d = 1",
    95  			},
    96  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b/b.js\", [\"d\", () => c_d]], [\"/c/c.js\", [\"d\", () => c_d]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst c_d = 1;\n\nconsole.log(c_d);",
    97  			[]Option{File("/a.js")},
    98  		},
    99  		{ // 10
   100  			loader{
   101  				"/a.js":   "import * as e from './b/b.js'; console.log(e.d)",
   102  				"/b/b.js": "export * from '../c/c.js'",
   103  				"/c/c.js": "export const d = 1",
   104  			},
   105  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b/b.js\", [\"d\", () => c_d]], [\"/c/c.js\", [\"d\", () => c_d]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst c_d = 1;\n\nconst e = await include(\"/b/b.js\", true);\n\nconsole.log(e.d);",
   106  			[]Option{File("/a.js")},
   107  		},
   108  		{ // 11
   109  			loader{
   110  				"/a.js":   "import {b, c} from './b/b.js'; console.log(b, c)",
   111  				"/b/b.js": "import {c} from '../c/c.js';const b = 1;export {b, c};",
   112  				"/c/c.js": "import {b} from '../b/b.js';const c = 2;export {b, c};",
   113  			},
   114  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b/b.js\", [\"b\", () => b_b], [\"c\", () => c_c]], [\"/c/c.js\", [\"b\", () => b_b], [\"c\", () => c_c]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst c_c = 2;\n\nconst b_b = 1;\n\nconsole.log(b_b, c_c);",
   115  			[]Option{File("/a.js")},
   116  		},
   117  		{ // 12
   118  			loader{
   119  				"/a.js":   "import {a as ba, b as bb} from './b/b.js'; import {a as ca, b as cb} from './c/c.js'; console.log(ba, bb, ca, cb)",
   120  				"/b/b.js": "export * from '../c/c.js';export const a = 1;",
   121  				"/c/c.js": "export * from '../b/b.js';export const b = 2;",
   122  			},
   123  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b/b.js\", [\"a\", () => b_a], [\"b\", () => c_b]], [\"/c/c.js\", [\"a\", () => b_a], [\"b\", () => c_b]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst c_b = 2;\n\nconst b_a = 1;\n\nconsole.log(b_a, c_b, b_a, c_b);",
   124  			[]Option{File("/a.js")},
   125  		},
   126  		{ // 13
   127  			loader{
   128  				"/a.js":   "import {a, b, c} from './b/b.js'; console.log(a, b, c)",
   129  				"/b/b.js": "export * from '../c/c.js';export const a = 1;",
   130  				"/c/c.js": "export const a = 2, b = 3, c = 4",
   131  			},
   132  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b/b.js\", [\"a\", () => b_a], [\"b\", () => c_b], [\"c\", () => c_c]], [\"/c/c.js\", [\"a\", () => c_a], [\"b\", () => c_b], [\"c\", () => c_c]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst c_a = 2, c_b = 3, c_c = 4;\n\nconst b_a = 1;\n\nconsole.log(b_a, c_b, c_c);",
   133  			[]Option{File("/a.js")},
   134  		},
   135  		{ // 14
   136  			loader{
   137  				"/a.js": "import {a} from '/b.js'; console.log(a)",
   138  				"/b.js": "export * from '/c.js';",
   139  				"/c.js": "export let a = 1;",
   140  			},
   141  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"a\", () => c_a]], [\"/c.js\", [\"a\", () => c_a]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nlet c_a = 1;\n\nconsole.log(c_a);",
   142  			[]Option{File("/a.js")},
   143  		},
   144  		{ // 15
   145  			loader{
   146  				"/a.js": "import {a} from '/b.js'; console.log(a)",
   147  				"/b.js": "export * from '/c.js';",
   148  				"/c.js": "export var a = 1;",
   149  			},
   150  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"a\", () => c_a]], [\"/c.js\", [\"a\", () => c_a]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nvar c_a = 1;\n\nconsole.log(c_a);",
   151  			[]Option{File("/a.js")},
   152  		},
   153  		{ // 16
   154  			loader{
   155  				"/a.js": "import fn from './b.js'; fn()",
   156  				"/b.js": "export default function () {}",
   157  			},
   158  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"default\", () => b_default]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nfunction b_default() {}\n\nb_default();",
   159  			[]Option{File("/a.js")},
   160  		},
   161  		{ // 17
   162  			loader{
   163  				"/a.js": "import cl from './b.js'; new cl()",
   164  				"/b.js": "export default class {}",
   165  			},
   166  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"default\", () => b_default]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nclass b_default {}\n\nnew b_default();",
   167  			[]Option{File("/a.js")},
   168  		},
   169  		{ // 18
   170  			loader{
   171  				"/a.js": "import vr from './b.js'; console.log(vr)",
   172  				"/b.js": "const b = 1; export default b",
   173  			},
   174  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"default\", () => b_default]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nconst b_b = 1;\n\nconst b_default = b_b;\n\nconsole.log(b_default);",
   175  			[]Option{File("/a.js")},
   176  		},
   177  		{ // 19
   178  			loader{
   179  				"/a.js": "import vr from './b.js'; console.log(vr)",
   180  				"/b.js": "export default class MyClass {}",
   181  			},
   182  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"default\", () => b_default]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nclass b_default {}\n\nconsole.log(b_default);",
   183  			[]Option{File("/a.js")},
   184  		},
   185  		{ // 20
   186  			loader{
   187  				"/a.js": "import vr from './b.js'; console.log(vr)",
   188  				"/b.js": "export default class MyClass {static INSTANCE = new MyClass();}",
   189  			},
   190  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"default\", () => b_default]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nclass b_default {\n\tstatic INSTANCE = new b_default();\n}\n\nconsole.log(b_default);",
   191  			[]Option{File("/a.js")},
   192  		},
   193  		{ // 21
   194  			loader{
   195  				"/a.js": "import vr from './b.js'; console.log(vr)",
   196  				"/b.js": "export default function aaa() {}",
   197  			},
   198  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"default\", () => b_default]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nfunction b_default() {}\n\nconsole.log(b_default);",
   199  			[]Option{File("/a.js")},
   200  		},
   201  		{ // 22
   202  			loader{
   203  				"/a.js": "import vr from './b.js'; console.log(vr)",
   204  				"/b.js": "export default function aaa() {aaa()}",
   205  			},
   206  			"Object.defineProperty(globalThis, \"include\", {value: (() => {\n\tconst imports = new Map([[\"/a.js\"], [\"/b.js\", [\"default\", () => b_default]]].map(([url, ...props]) => [url, Object.freeze(Object.defineProperties({}, Object.fromEntries(props.map(([prop, get]) => [prop, {enumerable: true, get}]))))]));\n\treturn url => Promise.resolve(imports.get(url) ?? import(url));\n})()});\n\nfunction b_default() {\n\tb_default();\n}\n\nconsole.log(b_default);",
   207  			[]Option{File("/a.js")},
   208  		},
   209  	} {
   210  		s, err := Package(append(test.Options, Loader(test.Input.load))...)
   211  		if err != nil {
   212  			t.Fatalf("test %d: unexpected err: %s", n+1, err)
   213  		}
   214  		output := fmt.Sprintf("%s", s)
   215  		if output != test.Output {
   216  			t.Errorf("test %d: expecting output: %q\ngot: %q", n+1, test.Output, output)
   217  		}
   218  	}
   219  }
   220  
   221  func TestPlugin(t *testing.T) {
   222  	for n, test := range [...]struct {
   223  		Input  string
   224  		URL    string
   225  		Output string
   226  	}{
   227  		{ // 1
   228  			"import a from './b.js';console.log(a)",
   229  			"/a.js",
   230  			"const a_ = await include(\"/b.js\");\n\nconsole.log(a_.default);",
   231  		},
   232  		{ // 2
   233  			"import a from '../b.js';console.log(a)",
   234  			"/a/a.js",
   235  			"const a_ = await include(\"/b.js\");\n\nconsole.log(a_.default);",
   236  		},
   237  		{ // 3
   238  			"import a, {b, c} from './b.js';console.log(a, b, c)",
   239  			"/a.js",
   240  			"const a_ = await include(\"/b.js\");\n\nconsole.log(a_.default, a_.b, a_.c);",
   241  		},
   242  		{ // 4
   243  			"import * as a from './b.js';console.log(a)",
   244  			"/a.js",
   245  			"const a_ = await include(\"/b.js\");\n\nconsole.log(a_);",
   246  		},
   247  	} {
   248  		tks := parser.NewStringTokeniser(test.Input)
   249  		m, err := javascript.ParseModule(&tks)
   250  		if err != nil {
   251  			t.Fatalf("test %d: unexpected err: %s", n+1, err)
   252  		}
   253  		s, err := Plugin(m, test.URL)
   254  		if err != nil {
   255  			t.Fatalf("test %d: unexpected err: %s", n+1, err)
   256  		}
   257  		output := fmt.Sprintf("%s", s)
   258  		if output != test.Output {
   259  			t.Errorf("test %d: expecting output: %q\ngot: %q", n+1, test.Output, output)
   260  		}
   261  	}
   262  }
   263