PowerShell - nucleotide-count

powershell/nucleotide-count/NucleotideCount.tests.ps1

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+BeforeAll {
+    . ".\NucleotideCount.ps1"
+}
+
+Describe "NucleotideCountTests" {
+	It "empty strand" {
+        Get-NucleotideCount -Strand "" | Should -BeExactly "A:0 C:0 G:0 T:0"
+	}
+
+	It "can count one nucleotide in single-character input" {
+		Get-NucleotideCount -Strand "G" | Should -BeExactly "A:0 C:0 G:1 T:0"
+	}
+
+	It "strand with repeated nucleotide" {
+		Get-NucleotideCount -Strand "GGGGGGG" | Should -BeExactly "A:0 C:0 G:7 T:0"
+	}
+
+	It "strand with multiple nucleotides" {
+		Get-NucleotideCount -Strand "AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC" | Should -BeExactly "A:20 C:12 G:17 T:21"
+	}
+
+	It "strand with invalid nucleotides" {
+		{ Get-NucleotideCount -Strand "AGXXACT" } | Should -Throw
+	}	
+}