diff --git a/docs/adr/0008-testable-evaluate.md b/docs/adr/0008-testable-evaluate.md
new file mode 100644
index 0000000000000000000000000000000000000000..fa48d9f4e64505efe7546c7c942d15c74f110de3
--- /dev/null
+++ b/docs/adr/0008-testable-evaluate.md
@@ -0,0 +1,22 @@
+# 8. testable evaluate
+
+Date: 2019-12-25
+
+## Status
+
+2019-12-25 proposed
+
+## Context
+
+Context here...
+
+ - 平均方法长度
+ static 方法数
+
+## Decision
+
+Decision here...
+
+## Consequences
+
+Consequences here...
diff --git a/docs/adr/README.md b/docs/adr/README.md
index ffc90e7eebcd6764c14d6d81d967e9348eb6a37a..78d30ab8a89ed92830e2b57d5dbfa91c2c0131d8 100644
--- a/docs/adr/README.md
+++ b/docs/adr/README.md
@@ -6,4 +6,5 @@
 * [4. handidraw-graphviz](0004-handidraw-graphviz.md)
 * [5. evaluate-api](0005-evaluate-api.md)
 * [6. support-adapter-to-cli-framework](0006-support-adapter-to-cli-framework.md)
-* [7. practise-go-patterns-in-coca](0007-practise-go-patterns-in-coca.md)
\ No newline at end of file
+* [7. practise-go-patterns-in-coca](0007-practise-go-patterns-in-coca.md)
+* [8. testable-evaluate](0008-testable-evaluate.md)
\ No newline at end of file