Initial project import

tools/v/vlib/maps/maps_test.v

@@ -0,0 +1,236 @@
+module maps
+
+interface TestValue {
+	value() string
+}
+
+struct TestValueImpl {
+	raw string
+}
+
+fn (v TestValueImpl) value() string {
+	return v.raw
+}
+
+fn test_filter() {
+	m1 := {
+		0: 'ab'
+		1: 'bc'
+		2: 'cd'
+		3: 'de'
+		4: 'ef'
+		5: 'fg'
+	}
+	assert filter(m1, fn (k int, v string) bool {
+		return k % 2 == 0
+	}) == {
+		0: 'ab'
+		2: 'cd'
+		4: 'ef'
+	}
+	assert filter(m1, fn (k int, v string) bool {
+		return v.contains('b') || v.contains('c')
+	}) == {
+		0: 'ab'
+		1: 'bc'
+		2: 'cd'
+	}
+}
+
+fn test_to_array() {
+	m1 := {
+		`a`: 'bc'
+		`d`: 'ef'
+		`g`: 'hi'
+	}
+	assert to_array(m1, fn (k rune, v string) string {
+		return '${k}${v}'
+	}) == ['abc', 'def', 'ghi']
+}
+
+fn test_helpers_with_interface_map_values() {
+	m1 := {
+		'a': TestValue(TestValueImpl{'bc'})
+		'd': TestValue(TestValueImpl{'ef'})
+		'g': TestValue(TestValueImpl{'hi'})
+	}
+	filtered := filter(m1, fn (k string, v TestValue) bool {
+		return k == 'a' || v.value() == 'ef'
+	})
+	assert filtered.len == 2
+	assert filtered['a'].value() == 'bc'
+	assert filtered['d'].value() == 'ef'
+	assert to_array(m1, fn (k string, v TestValue) string {
+		return '${k}${v.value()}'
+	}) == ['abc', 'def', 'ghi']
+	assert flat_map[string, TestValue, string](m1, fn (k string, v TestValue) []string {
+		return [k, v.value()]
+	}) == ['a', 'bc', 'd', 'ef', 'g', 'hi']
+	assert to_map[string, TestValue, string, string](m1, fn (k string, v TestValue) (string, string) {
+		return k, v.value()
+	}) == {
+		'a': 'bc'
+		'd': 'ef'
+		'g': 'hi'
+	}
+}
+
+fn test_flat_map() {
+	m1 := {
+		1: [2, 3]
+		4: [5, 6]
+		7: [8, 9]
+	}
+	assert flat_map[int, []int, int](m1, fn (k int, v []int) []int {
+		mut a := [k]
+		a << v
+		return a
+	}) == [1, 2, 3, 4, 5, 6, 7, 8, 9]
+}
+
+fn test_to_map() {
+	m1 := {
+		0: '0'
+		1: '1'
+		2: '2'
+		3: '3'
+		4: '4'
+		5: '5'
+	}
+	assert to_map[int, string, string, int](m1, fn (k int, v string) (string, int) {
+		return v, k
+	}) == {
+		'0': 0
+		'1': 1
+		'2': 2
+		'3': 3
+		'4': 4
+		'5': 5
+	}
+}
+
+fn test_invert() {
+	m1 := {
+		0: '0'
+		1: '1'
+		2: '2'
+		3: '3'
+		4: '4'
+		5: '5'
+	}
+	assert invert(m1) == {
+		'0': 0
+		'1': 1
+		'2': 2
+		'3': 3
+		'4': 4
+		'5': 5
+	}
+}
+
+fn test_from_array() {
+	a1 := [
+		'a',
+		'b',
+		'c',
+		'd',
+		'e',
+		'f',
+	]
+	assert from_array(a1) == {
+		0: 'a'
+		1: 'b'
+		2: 'c'
+		3: 'd'
+		4: 'e'
+		5: 'f'
+	}
+}
+
+fn test_merge_in_place() {
+	mut m1 := {
+		'abc': 'def'
+		'aa':  'bb'
+	}
+	m2 := {
+		'xyz': 'zyx'
+		'aa':  'dd'
+	}
+	merge_in_place(mut m1, m2)
+	assert m1 == {
+		'abc': 'def'
+		'aa':  'dd'
+		'xyz': 'zyx'
+	}
+	assert m2 == {
+		'xyz': 'zyx'
+		'aa':  'dd'
+	}
+
+	mut im1 := {
+		11: 22
+		33: 44
+	}
+	im2 := {
+		55: 66
+		33: 999
+	}
+	merge_in_place(mut im1, im2)
+	assert im1 == {
+		11: 22
+		33: 999
+		55: 66
+	}
+	assert im2 == {
+		55: 66
+		33: 999
+	}
+}
+
+fn test_merge() {
+	m1 := {
+		'abc': 'def'
+		'aa':  'bb'
+	}
+	m2 := {
+		'xyz': 'zyx'
+		'aa':  'dd'
+	}
+	res := merge(m1, m2)
+	assert res == {
+		'abc': 'def'
+		'aa':  'dd'
+		'xyz': 'zyx'
+	}
+	assert m1 == {
+		'abc': 'def'
+		'aa':  'bb'
+	}
+	assert m2 == {
+		'xyz': 'zyx'
+		'aa':  'dd'
+	}
+
+	mut im1 := {
+		11: 22
+		33: 44
+	}
+	im2 := {
+		55: 66
+		33: 999
+	}
+	ires := merge(im1, im2)
+	assert im1 == {
+		11: 22
+		33: 44
+	}
+	assert im2 == {
+		55: 66
+		33: 999
+	}
+	assert ires == {
+		11: 22
+		33: 999
+		55: 66
+	}
+}