diff --git a/.github/pr_test.yml b/.github/workflows/pr_test.yml
similarity index 93%
rename from .github/pr_test.yml
rename to .github/workflows/pr_test.yml
index 84f9b00..458a129 100644
--- a/.github/pr_test.yml
+++ b/.github/workflows/pr_test.yml
@@ -2,9 +2,9 @@ name: Run Tests on Pull Request
 
 on:
   push:
-    branches: [ "trunk" ]
+    branches: [ "main" ]
   pull_request:
-    branches: [ "trunk" ]
+    branches: [ "main" ]
 
   workflow_dispatch:
 
diff --git a/src/main/kotlin/Compilation.kt b/src/main/kotlin/Compilation.kt
index 36ccb7e..1f01cab 100644
--- a/src/main/kotlin/Compilation.kt
+++ b/src/main/kotlin/Compilation.kt
@@ -13,17 +13,26 @@ internal fun compilationForAssertations(
   assertAction: SymbolProcessorEnvironment.(Resolver) -> Unit,
 ): List<File> {
   assert(sources.any { it.isNotBlank() })
+  return compile(sources.toSomeClasses(), assertAction)
+}
+
+@OptIn(ExperimentalCompilerApi::class)
+private fun compile(
+  sourceFiles: List<SourceFile>,
+  assertAction: SymbolProcessorEnvironment.(Resolver) -> Unit,
+): List<File> {
+  assert(sourceFiles.isNotEmpty())
   val testKspProcessorProvider = TestKspProcessor.provider(assertAction)
-  return compilation(
-    sourceFiles = sources.toSomeClasses(),
+  val result = compilation(
+    sourceFiles = sourceFiles,
     processorProvider = testKspProcessorProvider,
-  )
-    .compile()
-    .also {
-      if (KotlinCompilation.ExitCode.OK == it.exitCode) return emptyList()
-      error(it.messages)
-    }
-    .generatedFiles.toList()
+  ).compile()
+
+  if (result.exitCode == KotlinCompilation.ExitCode.OK) {
+    return result.generatedFiles.toList()
+  }
+
+  error(result.messages)
 }
 
 internal fun List<String>.toSomeClasses(): List<SourceFile> = mapIndexed { index, name ->
@@ -32,6 +41,11 @@ internal fun List<String>.toSomeClasses(): List<SourceFile> = mapIndexed { index
   )
 }
 
+internal fun compilationForAssertations(
+  source: File,
+  assertAction: SymbolProcessorEnvironment.(Resolver) -> Unit,
+): List<File> = compile(listOf(SourceFile.fromPath(source)), assertAction)
+
 private fun String.toSomeClass(index: Int) = SourceFile.kotlin("SomeClass$index.kt", this)
 
 @OptIn(ExperimentalCompilerApi::class)
diff --git a/src/main/kotlin/dsl.kt b/src/main/kotlin/dsl.kt
index 3112c67..db1672a 100644
--- a/src/main/kotlin/dsl.kt
+++ b/src/main/kotlin/dsl.kt
@@ -10,3 +10,10 @@ infix fun String.compile(action: SymbolProcessorEnvironment.(Resolver) -> Unit):
 infix fun List<String>.compile(action: SymbolProcessorEnvironment.(Resolver) -> Unit): List<File> {
   return compilationForAssertations(this, action)
 }
+
+infix fun File.compile(action: SymbolProcessorEnvironment.(Resolver) -> Unit): List<File> {
+  if (exists()) {
+    return compilationForAssertations(this, action)
+  }
+  throw IllegalArgumentException("File $this does not exist")
+}
diff --git a/src/test/kotlin/CompilationForAssertationTest.kt b/src/test/kotlin/CompilationForAssertationTest.kt
index ddbc553..bf96b4b 100644
--- a/src/test/kotlin/CompilationForAssertationTest.kt
+++ b/src/test/kotlin/CompilationForAssertationTest.kt
@@ -1,4 +1,5 @@
 import org.junit.jupiter.api.assertThrows
+import java.io.File
 import kotlin.test.Test
 import kotlin.test.assertTrue
 
@@ -29,7 +30,7 @@ class CompilationForAssertationTest {
   }
 
   @Test
-  fun `blank sourse should trow error`() {
+  fun `blank source should trow error`() {
     assertThrows<AssertionError> {
       "" compile {
         assertTrue { true }
@@ -48,4 +49,18 @@ class CompilationForAssertationTest {
       incorrectCode compile {}
     }
   }
+
+  @Test
+  fun `correct file should compile`() {
+    File("src/test/kotlin/FilesForTests/CorrectFile.kt") compile {
+      assertTrue { true }
+    }
+  }
+
+  @Test
+  fun `wrong file should not compile`() {
+    assertThrows<IllegalArgumentException> {
+      File("") compile {}
+    }
+  }
 }
diff --git a/src/test/kotlin/FilesForTests/CorrectFile.kt b/src/test/kotlin/FilesForTests/CorrectFile.kt
new file mode 100644
index 0000000..c39949c
--- /dev/null
+++ b/src/test/kotlin/FilesForTests/CorrectFile.kt
@@ -0,0 +1,7 @@
+package FilesForTests
+
+class CorrectFile {
+  fun helloWorld(): String {
+    return "Hello World!"
+  }
+}