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test("plain literals with expression-like characters", () => {
expect(`foo`).toBe("foo");
expect(`foo{`).toBe("foo{");
expect(`foo}`).toBe("foo}");
expect(`foo$`).toBe("foo$");
});
test("plain literals with escaped special characters", () => {
expect(`foo\``).toBe("foo`");
expect(`foo\$`).toBe("foo$");
expect(`foo \${"bar"}`).toBe('foo ${"bar"}');
});
test("literals in expressions", () => {
expect(`foo ${undefined}`).toBe("foo undefined");
expect(`foo ${null}`).toBe("foo null");
expect(`foo ${5}`).toBe("foo 5");
expect(`foo ${true}`).toBe("foo true");
expect(`foo ${"bar"}`).toBe("foo bar");
});
test("objects in expressions", () => {
expect(`foo ${{}}`).toBe("foo [object Object]");
expect(`foo ${{ bar: { baz: "qux" } }}`).toBe("foo [object Object]");
});
test("expressions at beginning of template literal", () => {
expect(`${"foo"} bar baz`).toBe("foo bar baz");
expect(`${"foo bar baz"}`).toBe("foo bar baz");
});
test("multiple template literals", () => {
expect(`foo ${"bar"} ${"baz"}`).toBe("foo bar baz");
});
test("variables in expressions", () => {
let a = 27;
expect(`${a}`).toBe("27");
expect(`foo ${a}`).toBe("foo 27");
expect(`foo ${a ? "bar" : "baz"}`).toBe("foo bar");
expect(`foo ${(() => a)()}`).toBe("foo 27");
});
test("template literals in expressions", () => {
expect(`foo ${`bar`}`).toBe("foo bar");
expect(`${`${`${`${"foo"}`} bar`}`}`).toBe("foo bar");
});
test("newline literals (not characters)", () => {
expect(
`foo
bar`
).toBe("foo\n bar");
});
test("line continuation in literals (not characters)", () => {
expect(
`foo\
bar`
).toBe("foo bar");
});
test("reference error from expressions", () => {
expect(() => `${b}`).toThrowWithMessage(ReferenceError, "'b' is not defined");
});
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