reorg: move js runtime tests to cli/js/tests/ (#4250)

All Deno runtime test files were moved to cli/js/tests/ directory.

It makes a clear distinction that cli/js/tests/ contains code
that is run under Deno runtime as opposed to code in cli/js/ which
is used to create bundle and snapshot with "deno_typescript".

cli/js/tests/compiler_api_test.ts

@@ -0,0 +1,153 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+import { assert, assertEquals, unitTest } from "./test_util.ts";
+
+const { compile, transpileOnly, bundle } = Deno;
+
+unitTest(async function compilerApiCompileSources() {
+  const [diagnostics, actual] = await compile("/foo.ts", {
+    "/foo.ts": `import * as bar from "./bar.ts";\n\nconsole.log(bar);\n`,
+    "/bar.ts": `export const bar = "bar";\n`
+  });
+  assert(diagnostics == null);
+  assert(actual);
+  assertEquals(Object.keys(actual), [
+    "/bar.js.map",
+    "/bar.js",
+    "/foo.js.map",
+    "/foo.js"
+  ]);
+});
+
+unitTest(async function compilerApiCompileNoSources() {
+  const [diagnostics, actual] = await compile("./cli/tests/subdir/mod1.ts");
+  assert(diagnostics == null);
+  assert(actual);
+  const keys = Object.keys(actual);
+  assertEquals(keys.length, 6);
+  assert(keys[0].endsWith("print_hello.js.map"));
+  assert(keys[1].endsWith("print_hello.js"));
+});
+
+unitTest(async function compilerApiCompileOptions() {
+  const [diagnostics, actual] = await compile(
+    "/foo.ts",
+    {
+      "/foo.ts": `export const foo = "foo";`
+    },
+    {
+      module: "amd",
+      sourceMap: false
+    }
+  );
+  assert(diagnostics == null);
+  assert(actual);
+  assertEquals(Object.keys(actual), ["/foo.js"]);
+  assert(actual["/foo.js"].startsWith("define("));
+});
+
+unitTest(async function compilerApiCompileLib() {
+  const [diagnostics, actual] = await compile(
+    "/foo.ts",
+    {
+      "/foo.ts": `console.log(document.getElementById("foo"));
+        console.log(Deno.args);`
+    },
+    {
+      lib: ["dom", "es2018", "deno.ns"]
+    }
+  );
+  assert(diagnostics == null);
+  assert(actual);
+  assertEquals(Object.keys(actual), ["/foo.js.map", "/foo.js"]);
+});
+
+unitTest(async function compilerApiCompileTypes() {
+  const [diagnostics, actual] = await compile(
+    "/foo.ts",
+    {
+      "/foo.ts": `console.log(Foo.bar);`
+    },
+    {
+      types: ["./cli/tests/subdir/foo_types.d.ts"]
+    }
+  );
+  assert(diagnostics == null);
+  assert(actual);
+  assertEquals(Object.keys(actual), ["/foo.js.map", "/foo.js"]);
+});
+
+unitTest(async function transpileOnlyApi() {
+  const actual = await transpileOnly({
+    "foo.ts": `export enum Foo { Foo, Bar, Baz };\n`
+  });
+  assert(actual);
+  assertEquals(Object.keys(actual), ["foo.ts"]);
+  assert(actual["foo.ts"].source.startsWith("export var Foo;"));
+  assert(actual["foo.ts"].map);
+});
+
+unitTest(async function transpileOnlyApiConfig() {
+  const actual = await transpileOnly(
+    {
+      "foo.ts": `export enum Foo { Foo, Bar, Baz };\n`
+    },
+    {
+      sourceMap: false,
+      module: "amd"
+    }
+  );
+  assert(actual);
+  assertEquals(Object.keys(actual), ["foo.ts"]);
+  assert(actual["foo.ts"].source.startsWith("define("));
+  assert(actual["foo.ts"].map == null);
+});
+
+unitTest(async function bundleApiSources() {
+  const [diagnostics, actual] = await bundle("/foo.ts", {
+    "/foo.ts": `export * from "./bar.ts";\n`,
+    "/bar.ts": `export const bar = "bar";\n`
+  });
+  assert(diagnostics == null);
+  assert(actual.includes(`__instantiate("foo")`));
+  assert(actual.includes(`__exp["bar"]`));
+});
+
+unitTest(async function bundleApiNoSources() {
+  const [diagnostics, actual] = await bundle("./cli/tests/subdir/mod1.ts");
+  assert(diagnostics == null);
+  assert(actual.includes(`__instantiate("mod1")`));
+  assert(actual.includes(`__exp["printHello3"]`));
+});
+
+unitTest(async function bundleApiConfig() {
+  const [diagnostics, actual] = await bundle(
+    "/foo.ts",
+    {
+      "/foo.ts": `// random comment\nexport * from "./bar.ts";\n`,
+      "/bar.ts": `export const bar = "bar";\n`
+    },
+    {
+      removeComments: true
+    }
+  );
+  assert(diagnostics == null);
+  assert(!actual.includes(`random`));
+});
+
+unitTest(async function bundleApiJsModules() {
+  const [diagnostics, actual] = await bundle("/foo.js", {
+    "/foo.js": `export * from "./bar.js";\n`,
+    "/bar.js": `export const bar = "bar";\n`
+  });
+  assert(diagnostics == null);
+  assert(actual.includes(`System.register("bar",`));
+});
+
+unitTest(async function diagnosticsTest() {
+  const [diagnostics] = await compile("/foo.ts", {
+    "/foo.ts": `document.getElementById("foo");`
+  });
+  assert(Array.isArray(diagnostics));
+  assert(diagnostics.length === 1);
+});