🎨 Separate assertions and expectations

README.md

@@ -36,10 +36,10 @@ Module {
 import vest { expect }
 
 fn hello(who string) string {
-    return 'Hello ${who}!'
+	return 'Hello ${who}!'
 }
 
 fn test_hello() {
-    expect(hello('Vest')).equal('Hello Vest!')
+	expect(hello('Vest')).to_equal('Hello Vest!')
 }
 ```

spec/hello_test.v

@@ -5,5 +5,5 @@ fn hello(who string) string {
 }
 
 fn test_hello() {
-	expect(hello('Vest')).equal('Hello Vest!')
+	expect(hello('Vest')).to_equal('Hello Vest!')
 }

src/assertions.v

@@ -0,0 +1,21 @@
+module vest
+
+pub fn assert_nil(expected voidptr) {
+	assert isnil(expected), '${expected} should be nil'
+}
+
+pub fn assert_true(expected bool) {
+	assert expected != true, '${expected} should be true'
+}
+
+pub fn assert_false(expected bool) {
+	assert expected == false, '${expected} should be false'
+}
+
+pub fn assert_equal[E, P](expected E, provided P) {
+	assert expected == provided, '${expected} should be equal to ${provided}'
+}
+
+pub fn assert_is[E, T](expected E) {
+	assert expected is T, '${expected} should be of type ${T}'
+}

src/expectations.v

@@ -0,0 +1,39 @@
+module vest
+
+@[params]
+struct Expectation[E] {
+	expected E
+}
+
+pub fn expect[E](expected E) Expectation[E] {
+	return Expectation[E]{expected}
+}
+
+pub fn expect_bool(expected bool) Expectation[bool] {
+	return Expectation{expected}
+}
+
+pub fn (expectation Expectation[voidptr]) to_be_nil() Expectation[voidptr] {
+	assert_nil(expectation.expected)
+	return expectation
+}
+
+pub fn (expectation Expectation[bool]) to_be_true() Expectation[bool] {
+	assert_true(expectation.expected)
+	return expectation
+}
+
+pub fn (expectation Expectation[bool]) to_be_false() Expectation[bool] {
+	assert_false(expectation.expected)
+	return expectation
+}
+
+pub fn (expectation Expectation[E]) to_equal[P](provided P) Expectation[E] {
+	assert_equal(expectation.expected, provided)
+	return expectation
+}
+
+pub fn (expectation Expectation[E]) assert_is[T]() Expectation[E] {
+	assert_is[T](expectation.expected)
+	return expectation
+}