Add RNA transcription assignment in Rust

Author: cypher

assignments/rust/rna-transcription/example.rs

@@ -0,0 +1,29 @@
+#[deriving(Eq)]
+struct RibonucleicAcid {
+    nucleotides: ~str
+}
+
+impl RibonucleicAcid {
+    pub fn new(nucleotides: ~str) -> RibonucleicAcid { RibonucleicAcid { nucleotides: nucleotides } }
+}
+
+impl ToStr for RibonucleicAcid {
+    fn to_str(&self) -> ~str {
+        self.nucleotides.to_str()
+    }
+}
+
+struct DeoxyribonucleicAcid {
+    nucleotides: ~str
+}
+
+impl DeoxyribonucleicAcid {
+    pub fn new(nucleotides: ~str) -> DeoxyribonucleicAcid { DeoxyribonucleicAcid { nucleotides: nucleotides } }
+
+    pub fn to_rna(&self) -> RibonucleicAcid {
+        let rna_nucleotides = self.nucleotides.map_chars(|chr| if chr == 'T' { 'U' } else { chr } );
+
+        RibonucleicAcid { nucleotides: rna_nucleotides }
+    }
+}
+

assignments/rust/rna-transcription/rna-transcription_test.rs

@@ -0,0 +1,50 @@
+#[link(name = "rna-transcription", vers = "1.0")];
+#[crate_type = "lib"];
+
+extern mod std;
+
+mod dna;
+
+#[test]
+#[should_fail]
+fn test_acid_equals_acid() {
+    assert_eq!(dna::RibonucleicAcid::new(~"CGA"), dna::RibonucleicAcid::new(~"CGA"));
+    assert!(dna::RibonucleicAcid::new(~"CGA") != dna::RibonucleicAcid::new(~"AGC"));
+}
+
+#[test]
+#[should_fail]
+fn test_transcribes_cytidine_unchanged() {
+    assert_eq!(dna::RibonucleicAcid::new(~"C"), dna::DeoxyribonucleicAcid::new(~"C").to_rna());
+}
+
+#[test]
+#[should_fail]
+fn test_transcribes_guanosine_unchanged() {
+    assert_eq!(dna::RibonucleicAcid::new(~"G"), dna::DeoxyribonucleicAcid::new(~"G").to_rna());
+}
+
+#[test]
+#[should_fail]
+fn test_transcribes_adenosine_unchanged() {
+    assert_eq!(dna::RibonucleicAcid::new(~"A"), dna::DeoxyribonucleicAcid::new(~"A").to_rna());
+}
+
+#[test]
+#[should_fail]
+fn test_transcribes_thymidine_to_uracil() {
+    assert_eq!(dna::RibonucleicAcid::new(~"U"), dna::DeoxyribonucleicAcid::new(~"T").to_rna());
+}
+
+#[test]
+#[should_fail]
+fn test_transcribes_all_occurrences_of_thymidine_to_uracil() {
+    assert_eq!(dna::RibonucleicAcid::new(~"ACGUGGUCUUAA"), dna::DeoxyribonucleicAcid::new(~"ACGTGGTCTTAA").to_rna())
+}
+
+#[test]
+#[should_fail]
+fn test_acid_converts_to_string() {
+    assert_eq!(dna::RibonucleicAcid::new(~"AGC").to_str(), ~"AGC");
+    assert_eq!(dna::RibonucleicAcid::new(~"CGA").to_str(), ~"CGA");
+}