feat(expect): add more methods

tests/Expect/toBeFalse.php

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+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('strict comparisons', function () {
+    expect(false)->toBeFalse();
+});
+
+test('failures', function () {
+    expect('')->toBeFalse();
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(false)->not->toBe(false);
+})->throws(ExpectationFailedException::class);

tests/Expect/toBeGreatherThan.php

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+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('passes', function () {
+    expect(42)->toBeGreaterThan(41);
+    expect(4)->toBeGreaterThan(3.9);
+});
+
+test('failures', function () {
+    expect(4)->toBeGreaterThan(4);
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(5)->not->toBeGreaterThan(4);
+})->throws(ExpectationFailedException::class);

tests/Expect/toBeGreatherThanOrEqual.php

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+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('passes', function () {
+    expect(42)->toBeGreaterThanOrEqual(41);
+    expect(4)->toBeGreaterThanOrEqual(4);
+});
+
+test('failures', function () {
+    expect(4)->toBeGreaterThanOrEqual(4.1);
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(5)->not->toBeGreaterThanOrEqual(5);
+})->throws(ExpectationFailedException::class);

tests/Expect/toBeLessThan.php

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+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('passes', function () {
+    expect(41)->toBeLessThan(42);
+    expect(4)->toBeLessThan(5);
+});
+
+test('failures', function () {
+    expect(4)->toBeLessThan(4);
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(5)->not->toBeLessThan(6);
+})->throws(ExpectationFailedException::class);

tests/Expect/toBeLessThanOrEqual.php

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+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('passes', function () {
+    expect(41)->toBeLessThanOrEqual(42);
+    expect(4)->toBeLessThanOrEqual(4);
+});
+
+test('failures', function () {
+    expect(4)->toBeLessThanOrEqual(3.9);
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect(5)->not->toBeLessThanOrEqual(5);
+})->throws(ExpectationFailedException::class);

tests/Expect/toContain.php

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+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('passes', function () {
+    expect([1, 2, 42])->toContain(42);
+});
+
+test('failures', function () {
+    expect([1, 2, 42])->toContain(3);
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect([1, 2, 42])->not->toContain(42);
+})->throws(ExpectationFailedException::class);

tests/Expect/toContainString.php

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+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('is case sensitive', function () {
+    expect('hello world')->toContainString('world');
+    expect('hello world')->not->toContainString('World');
+});
+
+test('failures', function () {
+    expect('hello world')->toContainString('Hello');
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect('hello world')->not->toContainString('hello');
+})->throws(ExpectationFailedException::class);

tests/Expect/toContainStringIgnoringCase.php

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+<?php
+
+use PHPUnit\Framework\ExpectationFailedException;
+
+test('ignore difference in casing', function () {
+    expect('hello world')->toContainStringIgnoringCase('world');
+    expect('hello world')->toContainStringIgnoringCase('World');
+});
+
+test('failures', function () {
+    expect('hello world')->toContainStringIgnoringCase('hi');
+})->throws(ExpectationFailedException::class);
+
+test('not failures', function () {
+    expect('hello world')->not->toContainStringIgnoringCase('Hello');
+    expect('hello world')->not->toContainStringIgnoringCase('hello');
+})->throws(ExpectationFailedException::class);