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Add integer input tests for lerpDouble (flutter/engine#20880)

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The `a` and `b` parameters to `lerpDouble` have type `num`. This adds
tests for integer parameter values.
This commit is contained in:
Chris Bracken 2020-08-29 16:48:41 -07:00 committed by GitHub
parent 1cba2c8570
commit 399a7961cd
1 changed files with 21 additions and 0 deletions
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21
engine/src/flutter/testing/dart/lerp_test.dart
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@ -12,36 +12,57 @@ void main() {
expect(lerpDouble(null, null, 1.0), isNull);
expect(lerpDouble(5.0, null, 0.25), isNotNull);
expect(lerpDouble(null, 5.0, 0.25), isNotNull);
expect(lerpDouble(5, null, 0.25), isNotNull);
expect(lerpDouble(null, 5, 0.25), isNotNull);
});
test('lerpDouble should treat a null input as 0 if the other input is non-null', () {
expect(lerpDouble(null, 10.0, 0.25), 2.5);
expect(lerpDouble(10.0, null, 0.25), 7.5);
expect(lerpDouble(null, 10, 0.25), 2.5);
expect(lerpDouble(10, null, 0.25), 7.5);
});
test('lerpDouble should handle interpolation values < 0.0', () {
expect(lerpDouble(0.0, 10.0, -5.0), -50.0);
expect(lerpDouble(10.0, 0.0, -5.0), 60.0);
expect(lerpDouble(0, 10, -5), -50);
expect(lerpDouble(10, 0, -5), 60);
});
test('lerpDouble should return the start value at 0.0', () {
expect(lerpDouble(2.0, 10.0, 0.0), 2.0);
expect(lerpDouble(10.0, 2.0, 0.0), 10.0);
expect(lerpDouble(2, 10, 0), 2);
expect(lerpDouble(10, 2, 0), 10);
});
test('lerpDouble should interpolate between two values', () {
expect(lerpDouble(0.0, 10.0, 0.25), 2.5);
expect(lerpDouble(10.0, 0.0, 0.25), 7.5);
expect(lerpDouble(0, 10, 0.25), 2.5);
expect(lerpDouble(10, 0, 0.25), 7.5);
});
test('lerpDouble should return the end value at 1.0', () {
expect(lerpDouble(2.0, 10.0, 1.0), 10.0);
expect(lerpDouble(10.0, 2.0, 1.0), 2.0);
expect(lerpDouble(0, 10, 5), 50);
expect(lerpDouble(10, 0, 5), -40);
});
test('lerpDouble should handle interpolation values > 1.0', () {
expect(lerpDouble(0.0, 10.0, 5.0), 50.0);
expect(lerpDouble(10.0, 0.0, 5.0), -40.0);
expect(lerpDouble(0, 10, 5), 50);
expect(lerpDouble(10, 0, 5), -40);
});
test('lerpDouble should return NaN if any input is NaN', () {