wip: code formatting nits continued

test/sortedIndexBy-methods.spec.js

@@ -0,0 +1,60 @@
+import lodashStable from 'lodash';
+import { _, slice, MAX_ARRAY_LENGTH, MAX_ARRAY_INDEX } from './utils';
+
+describe('sortedIndexBy methods', () => {
+    lodashStable.each(['sortedIndexBy', 'sortedLastIndexBy'], (methodName) => {
+        const func = _[methodName];
+        const isSortedIndexBy = methodName === 'sortedIndexBy';
+
+        it(`\`_.${methodName}\` should provide correct \`iteratee\` arguments`, () => {
+            let args;
+
+            func([30, 50], 40, function () {
+                args || (args = slice.call(arguments));
+            });
+
+            expect(args).toEqual([40]);
+        });
+
+        it(`\`_.${methodName}\` should work with \`_.property\` shorthands`, () => {
+            const objects = [{ x: 30 }, { x: 50 }];
+            const actual = func(objects, { x: 40 }, 'x');
+
+            expect(actual).toBe(1);
+        });
+
+        it(`\`_.${methodName}\` should avoid calling iteratee when length is 0`, () => {
+            const objects = [];
+            const actual = func(objects, { x: 50 }, assert.fail);
+
+            expect(actual).toBe(0);
+        });
+
+        it(`\`_.${methodName}\` should support arrays larger than \`MAX_ARRAY_LENGTH / 2\``, () => {
+            lodashStable.each([Math.ceil(MAX_ARRAY_LENGTH / 2), MAX_ARRAY_LENGTH], (length) => {
+                const array = [];
+                const values = [MAX_ARRAY_LENGTH, NaN, undefined];
+
+                array.length = length;
+
+                lodashStable.each(values, (value) => {
+                    let steps = 0;
+
+                    const actual = func(array, value, (value) => {
+                        steps++;
+                        return value;
+                    });
+
+                    const expected = (
+                        isSortedIndexBy ? !lodashStable.isNaN(value) : lodashStable.isFinite(value)
+                    )
+                        ? 0
+                        : Math.min(length, MAX_ARRAY_INDEX);
+
+                    expect(steps === 32 || steps === 33);
+                    expect(actual).toBe(expected);
+                });
+            });
+        });
+    });
+});