PowerShell - leap, raindrops, reverse-string, two-fer

powershell/leap/LeapYear.tests.ps1

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+BeforeAll {
+    . ".\LeapYear.ps1"
+}
+
+Describe "LeapYear Tests" {
+    It "Year not divisible by 4: common year" {
+        Test-LeapYear(2015) | Should -Be $false
+    }
+
+    It "Year divisible by 4, not divisible by 100: leap year" {
+        Test-LeapYear(1996) | Should -Be $true
+    }
+
+    It "Year divisible by 100, not divisible by 400: common year" {
+        Test-LeapYear(2100) | Should -Be $false
+    }
+
+    It "Year divisible by 400: leap year" {
+        Test-LeapYear(2000) | Should -Be $true
+    }
+}