From 6c25042f0f4feaf2bf6fbb358be1e0e08a020fcf Mon Sep 17 00:00:00 2001
From: Alexander Nozik <altavir@gmail.com>
Date: Sat, 25 Aug 2018 21:36:50 +0300
Subject: [PATCH] Context separation test for expressions

---
 .../kmath/expressions/FieldExpressionContextTest.kt   | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/kmath-common/src/test/kotlin/scientifik/kmath/expressions/FieldExpressionContextTest.kt b/kmath-common/src/test/kotlin/scientifik/kmath/expressions/FieldExpressionContextTest.kt
index dda267ec8..543e13d79 100644
--- a/kmath-common/src/test/kotlin/scientifik/kmath/expressions/FieldExpressionContextTest.kt
+++ b/kmath-common/src/test/kotlin/scientifik/kmath/expressions/FieldExpressionContextTest.kt
@@ -28,4 +28,15 @@ class FieldExpressionContextTest {
         assertEquals(expression("x" to Complex(1.0, 0.0)), Complex(4.0, 0.0))
         assertEquals(expression(), Complex(9.0, 0.0))
     }
+
+    @Test
+    fun separateContext() {
+        fun <T> FieldExpressionContext<T>.expression(): Expression<T>{
+            val x = variable("x")
+            return x * x + 2 * x + 1.0
+        }
+
+        val expression = FieldExpressionContext(DoubleField).expression()
+        assertEquals(expression("x" to 1.0), 4.0)
+    }
 }
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