More or less finalized the REST api.

tests/waveFrontService_test.ts

@@ -0,0 +1,59 @@
+import { StringReader, readAll } from "../src/deps.ts";
+import { Vector3D } from "../src/services/interfaces.ts";
+import { WaveFrontServiceImpl } from "../src/services/wavefrontService.ts";
+import { assertEquals } from 'https://deno.land/std/testing/asserts.ts';
+
+Deno.test('WaveFrontServiceImpl happy path ', async (t) => {
+    const waveFrontService = new WaveFrontServiceImpl();
+
+
+    await t.step("test trivial transform", async () => {
+        const content = "line 1\nline2\nline3\n"
+        const reader = new StringReader(content);
+
+        const ret = waveFrontService.transformLine(reader, (s) => `hello ${s}`);
+        const expt = "hello line 1\nhello line2\nhello line3\n"
+        assertEquals(new TextDecoder().decode(await readAll(ret)), expt);
+    });
+
+    await t.step("test trivial transform (no final new line in original file) `", async () => {
+        const content = "line 1\nline2\nline3"
+        const reader = new StringReader(content);
+
+        const ret = waveFrontService.transformLine(reader, (s) => `hello ${s}`);
+        const expt = "hello line 1\nhello line2\nhello line3\n"
+        assertEquals(new TextDecoder().decode(await readAll(ret)), expt);
+    });
+});
+
+Deno.test('WaveFrontServiceImpl getLineTransformer', async (t) => {
+    const waveFrontService = new WaveFrontServiceImpl();
+
+    await t.step("trivial cases", () => {
+        const fn = waveFrontService.getLineTransformer([1, 2, 3], [10, 11, 12])
+        
+        assertEquals(fn(''), '');
+        assertEquals(fn('hello'), 'hello');
+        assertEquals(fn('hello 1 2 3'), 'hello 1 2 3');
+    });
+
+    await t.step("transform cases", () => {
+        const scale: Vector3D = [5, 6, 7];
+        const translate: Vector3D = [10, 11, 12];
+        const fn = waveFrontService.getLineTransformer(scale, translate);
+        const expt = (x: number, y: number, z: number) => `v ${x * scale[0] + translate[0]} ${y * scale[1] + translate[1]} ${z * scale[2] + translate[2]}`;
+        const values = [-1, 2, 3, 10, 5.23, 34.56, -12.75 ]
+        for(const x of values){
+            for(const y of values){
+                for(const z of values){
+                    assertEquals(fn(`v ${x} ${y} ${z}`), expt(x, y, z));
+                    assertEquals(fn(`v ${x} ${y} ${z}   `), expt(x, y, z));
+                    assertEquals(fn(`v ${x} ${y} ${z} # foo bar`), expt(x, y, z));
+                
+                }
+            }
+        }    
+    });
+
+
+})