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58 lines
1.3 KiB
Markdown
58 lines
1.3 KiB
Markdown
# Disallow conditional logic (`no-if`)
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❌ This rule is deprecated. It was replaced by
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[`no-conditional-in-test`](no-conditional-in-test.md).
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<!-- end auto-generated rule header -->
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Conditional logic in tests is usually an indication that a test is attempting to
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cover too much, and not testing the logic it intends to. Each branch of code
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executing within an if statement will usually be better served by a test devoted
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to it.
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Conditionals are often used to satisfy the typescript type checker. In these
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cases, using the non-null assertion operator (!) would be best.
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## Rule details
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This rule prevents the use of if/ else statements and conditional (ternary)
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operations in tests.
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The following patterns are considered warnings:
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```js
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it('foo', () => {
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if ('bar') {
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// an if statement here is invalid
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// you are probably testing too much
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}
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});
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it('foo', () => {
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const bar = foo ? 'bar' : null;
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});
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```
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These patterns would not be considered warnings:
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```js
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it('foo', () => {
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// only test the 'foo' case
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});
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it('bar', () => {
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// test the 'bar' case separately
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});
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it('foo', () => {
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function foo(bar) {
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// nested functions are valid
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return foo ? bar : null;
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}
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});
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```
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## When Not To Use It
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If you do not wish to prevent the use of if statements in tests, you can safely
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disable this rule.
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