add some env test

inngest-core/src/test/kotlin/com/inngest/EnvironmentTest.kt

@@ -0,0 +1,58 @@
+package com.inngest
+
+import kotlin.test.*
+
+// NOTE: not sure how to test values using environment variables
+internal class EnvironmentTest {
+    // AppId
+    @Test
+    fun testInngestAppIdWithoutServeId() {
+        val clientId = "hello"
+        assertEquals(clientId, Environment.inngestAppId(clientId))
+    }
+
+    @Test
+    fun testInngestAppIdWithServeId() {
+        val clientId = "hello"
+        val serveId = "world"
+        assertEquals(serveId, Environment.inngestAppId(clientId, serveId))
+    }
+
+    // EventKey
+    @Test
+    fun testInngestEventKeyWithKey() {
+        val key = "event"
+        assertEquals(key, Environment.inngestEventKey(key))
+    }
+
+    @Test
+    fun testInngestEventKeyWithoutKey() {
+        assertEquals("", Environment.inngestEventKey())
+    }
+
+    // @Test
+    // fun testInngestEventKeyWithEnvVar() {}
+
+    // Signing key
+    @Test
+    fun testInngestSigningKeyWithKey() {
+        val key = "signing key"
+        assertEquals(key, Environment.inngestSigningKey(InngestEnv.Dev, key))
+    }
+
+    @Test
+    fun testInngestSigningKeyWithoutKeyDev() {
+        assertEquals("test", Environment.inngestSigningKey(InngestEnv.Dev))
+    }
+
+    // @Test
+    // fun testInngestSigningKeyWithEnvVarProd() {}
+
+    @Test
+    fun testInngestSigningKeyWithoutKeyOrEnvVarProd() {
+        assertFails(
+            "signing key is required",
+            { Environment.inngestSigningKey(InngestEnv.Prod) },
+        )
+    }
+}