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'use strict';
// =======================================
//
// Utility functions for testing keyframes
//
// =======================================
// ------------------------------
// Helper functions
// ------------------------------
/**
* Test equality between two lists of computed keyframes
* @param {Array.<ComputedKeyframe>} a - actual computed keyframes
* @param {Array.<ComputedKeyframe>} b - expected computed keyframes
*/
function assert_frame_lists_equal(a, b, message) {
assert_equals(a.length, b.length, `number of frames: ${(message || '')}`);
for (let i = 0; i < Math.min(a.length, b.length); i++) {
assert_frames_equal(a[i], b[i],
`ComputedKeyframe #${i}: ${(message || '')}`);
}
}
/** Helper for assert_frame_lists_equal */
function assert_frames_equal(a, b, name) {
assert_equals(Object.keys(a).sort().toString(),
Object.keys(b).sort().toString(),
`properties on ${name} should match`);
// Iterates sorted keys to ensure stable failures.
for (const p of Object.keys(a).sort()) {
if (typeof b[p] == 'number')
assert_approx_equals(a[p], b[p], 1e-6, `value for '${p}' on ${name}`);
else if (typeof b[p] == 'object') {
for (const key in b[p]) {
if (typeof b[p][key] == 'number') {
assert_approx_equals(a[p][key], b[p][key], 1e-6,
`value for '${p}.${key}' on ${name}`);
} else {
assert_equals((a[p][key] || 'undefined').toString(),
b[p][key].toString(),
`value for '${p}.${key}' on ${name}`);
}
}
}
else
assert_equals(a[p], b[p], `value for '${p}' on ${name}`);
}
}