feat(launcher): add verified first-run installer

tests/AcDream.Launcher.Core.Tests/Installation/BakeProgressJsonlParserTests.cs

@@ -0,0 +1,57 @@
+using AcDream.Launcher.Core.Installation;
+
+namespace AcDream.Launcher.Core.Tests.Installation;
+
+public sealed class BakeProgressJsonlParserTests
+{
+    [Fact]
+    public void PartialChunksAreBufferedUntilTheJsonLineIsComplete()
+    {
+        var parser = new BakeProgressJsonlParser();
+
+        Assert.IsType<BakeHumanOutputEvent>(Assert.Single(
+            parser.Append("human startup text\n{\"v\":1,\"e\":\"pro")));
+        IReadOnlyList<BakeProgressEvent> events = parser.Append(
+            "gress\",\"phase\":\"mesh\",\"completed\":4,\"total\":10,"
+            + "\"failures\":0,\"elapsedSeconds\":5,\"etaSeconds\":7}\n");
+
+        Assert.Single(events);
+        BakeWorkProgressEvent progress =
+            Assert.IsType<BakeWorkProgressEvent>(events[0]);
+        Assert.Equal("mesh", progress.Phase);
+        Assert.Equal(4, progress.Completed);
+        Assert.Equal(10, progress.Total);
+    }
+
+    [Fact]
+    public void MalformedKnownPayloadAndTruncatedFinalLineNeverThrow()
+    {
+        var parser = new BakeProgressJsonlParser();
+        IReadOnlyList<BakeProgressEvent> first = parser.Append(
+            "{\"v\":1,\"e\":\"progress\",\"phase\":\"mesh\"}\n"
+            + "{not-json");
+        Assert.IsType<MalformedBakeProgressEvent>(Assert.Single(first));
+
+        MalformedBakeProgressEvent final = Assert.IsType<MalformedBakeProgressEvent>(
+            Assert.Single(parser.Complete()));
+        Assert.False(string.IsNullOrWhiteSpace(final.Reason));
+    }
+
+    [Fact]
+    public void UnknownKindsAndFutureVersionsRemainTypedAndFutureSafe()
+    {
+        var parser = new BakeProgressJsonlParser();
+        IReadOnlyList<BakeProgressEvent> events = parser.Append(
+            "{\"v\":1,\"e\":\"newMetric\",\"value\":9}\n"
+            + "{\"v\":2,\"e\":\"progress\",\"newShape\":true}\n"
+            + "{\"v\":1,\"e\":\"started\",\"bakeToolVersion\":4,"
+            + "\"outputPath\":\"pak\",\"futureField\":42}\n");
+
+        Assert.IsType<UnknownBakeProgressEvent>(events[0]);
+        FutureBakeProgressEvent future =
+            Assert.IsType<FutureBakeProgressEvent>(events[1]);
+        Assert.Equal(2, future.Version);
+        BakeStartedEvent started = Assert.IsType<BakeStartedEvent>(events[2]);
+        Assert.Equal(4u, started.BakeToolVersion);
+    }
+}